And now, we want you to know about a new consumer alert about a kind of fraud called cramming. Small charges $10, $20, $30 secretly inserted onto your credit card bill. Small charges that add up to millimeters of dollars. And today, a big new warning from the ftc. Abc's cecilia vega explains. Reporter: It hits consumers straight in the wallet -- a $30 charge here, $40 there, buried so deep in your credit card bills, you might never even notice it. Tens of thousands of americans were hit with what the ftc calls fake fees, charge it by vague financial services, like debt 2 wealth, draining more than $24 million in all. It was smart of them to steal little amounts at a time hoping consumers just don't notice. These people were already hurting. Reporter: Many of the consumers had recently applied for a payday loan or cash advance when they spotted the charge on the bill and called the toll free number next to it to complain. They entered an infuriating maze of call centers around the globe. It's called cramming. The ftc says 20 million people a year fall victim to it. And until now, most of the charges were buried in phone bills. I think $9.99 was the lowest charge and $49.99 was the largest charge. Reporter: That's exactly what happened to susan from georgia. The best advice? Inspect your bills. Line by line. And if there's a bogus charge, dispute it right away with your credit card company. Cecilia vega, abc news, los angeles.

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